Radiological Protection Ordinance
(RPO)

¹ In or­der to lim­it and mon­it­or ra­di­ation ex­pos­ure, the li­cence hold­er shall es­tab­lish con­trolled or su­per­vised areas.

² Activ­it­ies in­volving ra­dio­act­ive ma­ter­i­al above the li­cens­ing lim­it, with the ex­cep­tion of sealed ra­dio­act­ive sources, must be car­ried out with­in con­trolled areas in rooms which are de­signed as work­ing areas as spe­cified in Art­icle 81.

³ For rooms and loc­a­tions with­in su­per­vised or con­trolled areas where con­tam­in­a­tion of sur­faces or in­door air or in­creased am­bi­ent dose rates may oc­cur, the su­per­vis­ory au­thor­ity may or­der a clas­si­fic­a­tion in­to zones as spe­cified in Art­icle 82 and dis­pense with the es­tab­lish­ment of work­ing areas.